FVWM-Crystal aims to create an easy to use, pretty, but also powerful desktop environment for Linux or other Unix-like operating systems. It uses the following programs: FVWM as a window manager and "main core"; different ways to provide icons on the desktop including support for many file managers and custom commands; xterm, aterm, mrxvt, or urxvt as terminal emulators; MPD or XMMS2 as music players (there's built-in support for controlling these programs), and several other tools for different functions, like setting a wallpaper or taking screenshots.
Ctpp is the C99-compatible C preprocessor of the Ctalk language, which provides object oriented extensions for C. The preprocessor is compatible with GNU cpp and provides extensions like macro expansion in warning and error messages, saving expanded macros to files, and built-in symbol definition for many command line options. You can download the preprocessor separately while Ctalk is between versions for development.
xjobs runs several jobs in parallel and limits the number of jobs running at once so that every processor of the machine is busy, but not overloaded. A batch of long-running processes invoked from the shell are normally executed one after another, no matter how many processors are available. xjobs allows batching those jobs while still keeping the machine busy. The interface of xjobs is similar to that of xargs.
DISLIN is a high-level, easy-to-use plotting library for displaying data as curves, bar graphs, pie charts, 3D-colour plots, surfaces, contours, and maps. Several output formats are supported, such as X11, VGA, PostScript, PDF, CGM, HPGL, TIFF, and PNG. Plotting extensions for the interpreter-based languages Perl, Python, and Java are also supported for most operating systems.
Libpwmd provides an API for applications needing to communicate with PWMD (Password Manager Daemon). It is thread safe. It can connect to a remote pwmd server over an SSH channel or via TLS using a client certificate as authentication. It can use a pinentry program to prompt for a passphrase when needed. It supports secure memory management. It includes a command line client with a shell-like interface that can also read a Pwmd protocol command from standard input.
rsync is a replacement for rcp (and scp) that has many more features. It uses the "rsync algorithm" which provides a very fast method for remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand.
GNU grep is based on a fast lazy-state deterministic matcher (about twice as fast as stock Unix egrep) hybridized with a Boyer-Moore-Gosper search for a fixed string that eliminates impossible text from being considered by the full regexp matcher without necessarily having to look at every character. The result is typically many times faster than Unix grep or egrep.